One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(18,24)(19,26)(20,28)(21,22)(25,27)(29,30) involution — undirected(1,3,5,4)(2,6,7,8)(9,10)(11,14)(12,13)(15,16)(17,18,23,19)(20,25,30,27)(21,26,22,24)(28,31,29,32)(1,4,5,3)(2,6,7,8)(10,13)(14,16)(17,19,23,18)(20,27,30,25)(21,24,22,26)(28,32,29,31)(9,11,12,15)(10,14,13,16)(17,20,22,28,23,30,21,29)(18,25,24,31,19,27,26,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.